郑州大学臧双全团队报道了手性银(I)团簇与染料共组装的晶体缺陷工程诱导全色可调谐圆极化发光。相关研究成果于2021年12月2日发表于国际顶尖学术期刊《美国化学会杂志》。

通过在手性晶体金属团簇基质中掺杂染料分子，成功地获得了四对具有高发光不对称因子（～3×10^–3）的全色发光和圆极化发光（CPL）缺陷晶体。染料分子起着缺陷诱导剂的作用，并使晶体产生荧光。

研究表明，静电相互作用是产生缺陷晶体的主要动力，而手性空间的限制效应和缺陷晶体中的弱相互作用使本征手性主体银（I）能够进行高效的手性转移。该缺陷工程策略为晶体簇基材料的多功能化开辟了一条新途径。

附：英文原文

Title: Full-Color Tunable Circularly Polarized Luminescence Induced by the Crystal Defect from the Co-assembly of Chiral Silver(I) Clusters and Dyes

Author: Si Li, Xi-Yan Dong, Kong-Sheng Qi, Shuang-Quan Zang, Thomas C. W. Mak

Issue&Volume: December 2, 2021

Abstract: Four pairs of defective crystals exhibiting full-color emission and circularly polarized luminescence (CPL) with high luminescence dissymmetry factor (glum) values (～3 × 10–3) were successfully obtained by doping dye molecules into the chiral crystalline metal cluster-based matrixes. The dye molecules function as defect inducers and confer fluorescence  on the crystals. Studies reveal that electrostatic interactions provide the main impetus in generating defective crystals, and the restricted effect of chiral space and the weak interactions in defect crystal enable the efficient chiral transfer from the intrinsically chiral host silver(I) clusters to achiral luminescent dopants and finally induce them to emit bright CPL. This defect engineering strategy opens a new way to versatile functions for crystalline cluster-based materials.

DOI: 10.1021/jacs.1c09245

Source: https://pubs.acs.org/doi/10.1021/jacs.1c09245